brassard vs armor plate

brassard and armor plate both are nouns.

Word	Noun	Adjective	Verb	Adverb
brassard	Yes	No	No	No
armor plate	Yes	No	No	No

As nouns, armor plate is a hypernym of brassard; that is, armor plate is a word with a broader meaning than brassard:

brassard: armor plate that protects the arm
armor plate: specially hardened steel plate used to protect fortifications or vehicles from enemy fire

Other hypernyms of brassard include armor plating, armour plate, plate armor, plate armour.

brassard (noun)	armor plate (noun)
armor plate that protects the arm	specially hardened steel plate used to protect fortifications or vehicles from enemy fire